47
Polley HW, Johnson HB, Mayeux HS (1992) Carbon dioxide and water fl uxes of C 3 annuals and
C 3 and C 4 perennials at subambient CO 2 concentrations. Funct Ecol 6:693–703
Van Auken OW (2009) Causes and consequences of woody plant encroachment into western
North American Grasslands. J Environ Manage 90:2931–2942
Van Devender TR (1995) Desert grassland history: changing climates, evolution, biography, and
community dynamics. In: McClaran MP, Van Devender TR (eds) The desert grassland.
University of Arizona Press, Tucson, pp 68–99
References
Polley HW, Johnson HB, Mayeux HS (1992) Carbon dioxide and water fl uxes of C 3 annuals and
C 3 and C 4 perennials at subambient CO 2 concentrations. Funct Ecol 6:693–703
Van Auken OW (2009) Causes and consequences of woody plant encroachment into western
North American Grasslands. J Environ Manage 90:2931–2942
Van Devender TR (1995) Desert grassland history: changing climates, evolution, biography, and
community dynamics. In: McClaran MP, Van Devender TR (eds) The desert grassland.
University of Arizona Press, Tucson, pp 68–99
References